Mascara brush



FIG. 1 is a right side perspective view of a mascara brush showing our new design; and,

FIG. 2 is a left side perspective view of the mascara brush of FIG. 1.

The broken line showing of the end of the brush is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a mascara brush, as shown and described. 